Perturbed angular correlations investigations on YMnO3 multiferroic manganite

Tania Mendonca (1) , A.M.L. Lopes (2) , J.N. Goncalves (3, 4) , J.G. Correia (5) , P. B. Tavares (6) , V. S. Amaral (7) , Céline Darie (1) , J.P. Araujo (8, 9)

1 NEEL - MRS - Matériaux, Rayonnements, Structure
2 CFNUL - Centro de Física Nuclear da Universidade de Lisboa
3 Univ Aveiro, CICECO
4 Univ Aveiro, Dept Fis,
5 ITN - Inst Tecnol & Nucl
6 Univ Trcisas Os Montes & Alto Douro, Dept Quim, Ctr Quim
7 Departamento de Fisica [Aveiro]
8 IFIMUP - IFIMUP
9 INN - Inst Nanosci & Nanotechnol

The Perturbed Angular Correlation (PAC) technique was applied to study the yttrium local environment in YMnO3 multiferroic manganite. The electric field gradients (EFG) at the Y site have been measured as function of temperature, covering both ferroelectric and magnetic transitions. The results were compared with point charge model (PCM) calculations. The experimental results show two different EFG distributions for all temperatures. Only one can be directly attributed to the yttrium crystalline site in the hexagonal structure.

Mots clés: PAC; Manganites; Phase separation

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Tania Mendonca, A.M.L. Lopes, J.N. Goncalves, J.G. Correia, P. B. Tavares, et al.. Perturbed angular correlations investigations on YMnO3 multiferroic manganite. Hyperfine Interactions, 2010, 197 (1-3), pp.83. ⟨10.1007/s10751-010-0233-0⟩. ⟨hal-00978826⟩